package com.neuedu.oasystem.util;
/**
 * 工具类
 */
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * 设计一个jdbc操作工具类，用于封装通用操作
 * 
 * @author netboy
 *
 */
public class DBHelper {
	//封装4个参数
	private static final String DRIVER = "oracle.jdbc.driver.OracleDriver";
	private static final String URL = "jdbc:oracle:thin://localhost:1521/orcl";
	private static final String USER = "office";
	private static final String PASSWORD = "123456";
	
	//1.注册驱动 2.建立连接
	public static Connection openConnection() {
		Connection conn = null;
		try {
			Class.forName(DRIVER);
			conn = DriverManager.getConnection(URL, USER, PASSWORD);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return conn;
	}
	
	
	//6.关闭连接，释放资源
	public static void closeAll(ResultSet rs,Statement stmt,Connection conn) {
		//这个一个标准的关闭动作
		if(rs!=null) {
			try {
				rs.close();
			} catch (SQLException e) {
			}
		}
		if(stmt!=null) {
			try {
				stmt.close();
			} catch (SQLException e) {
			}
		}
		
		if(conn!=null) {
			try {
				conn.close();
			} catch (SQLException e) {
			}
		}
	}
	
}
